Primary finding
Probable cause
The pilot's failure to maintain control of the helicopter.
Investigator assessment
Analysis narrative
While student pilot was preparing for his first solo flight in the Robinson R44 II, he began the sprag clutch check and "split the needles," then released the throttle to proceed with the checklist. The governor then "kicked in", the rpm increased to 102 percent, and the helicopter began to spin on the pavement. The pilot-side skid snagged a crack on the pavement, collapsed, and the rotor and tail boom then struck the ground. The student pilot stated he never applied, unlocked, or released the collective. Examination of the flight controls by a Federal Aviation Administration inspector did not reveal any abnormalities.
Source record
Factual narrative
According to the student pilot, while preparing for his first solo flight in the Robinson R44 II, he began the sprag clutch check and "split the needles," and then released the throttle to proceed with the checklist. The governor then "kicked in", the rpm increased to 102 percent, and the helicopter began to spin on the pavement. The pilot-side skid snagged a crack on the pavement, collapsed, and the rotor and tail boom then struck the ground. The student pilot stated he never applied, unlocked, or released the collective. Examination of the flight controls by a Federal Aviation Administration inspector did not reveal any abnormalities.